AT86RF211S

更新时间： 2024-01-12 03:56:14

品牌	Logo	应用领域
爱特美尔 - ATMEL		ISM频段无线
页数	文件大小	规格书
15页	131K
描述
Transceiver for ISM Radio Applications

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AT86RF211S 技术参数

Data Demodulation and Crystal Selection for the

AT86RF211S

1. Introduction

This document gives an overview of the receiver chain of the AT86RF211S and its

associated embedded features:

AT86RF211S

FSK

Transceiver for

ISM Radio

Applications

• Discriminator: Demodulation of the RF signal (principle, measurement/tuning of

output voltage)

• Data slicer:From analog to digital world (different modes of functioning, how to set

up the data slicer threshold)

It also emphasizes the new possibilities of the AT86RF211S

• Selection of lower cost crystal

• Data rate up to 128 kbps

• Frequency deviation wider than 100 kHz

ApplicationNote

2. From Analog to Digital

2.1

Demodulation

2.1.1

Principle

The FSK modulation used by the AT86RF211S consists in coding each bit as follows:

• “0”: transmission of an RF signal at a frequency F0

• “1”: transmission of an RF signal at a frequency F1

• The channel frequency (or carrier) is the middle frequency Fc = (F0 + F1)/2

• F1 - Fc = Fc - F0 is called the frequency deviation

The receiver therefore has the overall task to:

• Down-convert the signal at lower frequencies (for filtering purposes): 10.7 MHz

and 455 kHz

• Convert the frequencies into voltages (= discriminator)

• Make a decision to separate “0” from “1” levels (= data slicer)

Rev. 5418A–WIRE–04/05

12 3 4 5 6 7...15

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型号	品牌	描述	获取价格	数据表
AT86RF211SAH	ATMEL	RF and Baseband Circuit, CMOS, PQFP48, TQFP-48	获取价格
AT86RF211SAH-R	ATMEL	RF and Baseband Circuit, CMOS, PQFP48, TQFP-48	获取价格
AT86RF211SAHW	ATMEL	Telecom IC, CMOS, PQFP48	获取价格
AT86RF211SAHW-R	ATMEL	RF and Baseband Circuit, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, PLASTIC,	获取价格
AT86RF212	ATMEL	Low Power 700/800/900 MHz	获取价格
AT86RF212_1	ATMEL	Low Power 700/800/900 MHz	获取价格